These massive moving sand dunes have swallowed an entire village and are still on the run.

Naturally formed rock city in Poland.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

Inside this Krakow church, an explosion of psychedelic color.

People in Poland have rallied to save this unnatural desert from being reclaimed by the forest.